Shade guide



1932- G. P. WANNEMACHER 1,842,923

SHADE GUIDE Filed Dec. 5, 1928 PRINCIPAL a: SHADES DENTAL RUBBERS.

IN VEN TOR.

Y awgepwmm ATTORNEY Patented Jan. 26 1932 UNITED STATES PATENT OFFICE GEORGE P. WANNEMAGHER, OF NEW YORK, N. Y., ASSIGNOR TO THE AMALGAMATED DENTAL C0. L'ID., OF LONDON, ENGLAND SHADE GUIDE Application filed December 3, 1928. Serial No. 323,248

This invention relates generally to the dental goods and has more particular reference to a novel shade guide for dental rubbers.

The invention has for an object the provision of an article of the class mentioned, which is of simple durable construction, desirable in use and ei'ficient in action, and which can be manufactured and sold at a reasonable cost.

The invention proposes the use of a backing block vulcanized in a mold with sunken recesses and vulcanized dental blocks inserted in the recesses in the backing block and vulcanized therein. These dental blocks are of Ti various shades for indicating dental rubber shades and are preferably arranged in a'con secutive order with the lighter shades first and darker succeeding shades. Indicating numerals are arranged on the sldes of the dental blocks, and on the rear side of the.

holding block an index is provided giving the names of the various shades as disclosed by the blocks. A means may be provided for moving certain of the blocks alongside other StittlOl'liLIY. blocks so that the colors may be compared.

For further comprehension of the invention, and of the objects and advantages there of, reference will be had to the following description and accompanying drawings, and to the appended claims in which the'various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure g 7 Fig. 1 is a perspective view of a device constructed according to this invention.

Fig. 2 is a transverse sectional view, taken on the line 6-6 of Fig. 1. 1

In the device illustrated in Figs. 1 and 2 a backing block 1O has been shown provided with a circular recess 16'and a plurality of dental Vulcanite rubber blocks 17 are vulcanized within this recess. A rotatable circu lar block 18 is mounted upon the backing block 10 by the spindles 19 and is disposed within the recess 16 so that its top surface is flushed with the top surface of the backing block.

A plurality of dental vulcanite rubber blocks 17 are vulcanized along the edges of the circular block and are arranged for aligning with the blocks 17. Indicating symhols 19 are arranged alongthe outer peripheryof the blocks 17 and similarsymbols 19 are arranged within the boundaries of the blocks 17. blocks of the same shade and normally a specific shade ofblocl: in the outer 'circleis direlctly opposite the same shade in the inner circ e. r

A spiral spring 20 is disposed between the circular block and the backing block and acts between theseblocks for normally holding the circular block in the before mentionedposition. If it is desired to compare the shades of the'blocks on the outer circle with any particular shade of block in the inner circle it is necessary only to manually move the circular block 18 so that the'blocks could be compared. Upon releasing the block 18 returns to its normal position.

All of the dental color blocks are of colors for matching different shades of persons gums; This being the case the diflerent blocks closely resemble each other, and-therefore it is highly desirable to bring different shade blocks together for comparison since the closer they arethe more accurate the comparison will be. The use of the shade guide consists in first placing it as close as possible to ones gums and picking out a block of a shade closest to the persons gums. After this is done, and ifthe particular shade is out 7 of stock this particular shade of block is compared with other shades availableby rotating the rotative circular block for positioning other blocks adjacent to the one selected. The ones judgment may be used for determining whether the selected shade or one of the other shades just matched with this shade will be the most desirable in a particular case. While I have shown and described the preferred embodiment of my invention, it is to be understood that I do not limit myself to the precise construction herein disclosed and the right is reserved to all changes and 1nodi-' iications coming within the scope of the invention as defined in the appended claims.

Having thus descrlbed my invention, what Like numerals are applied to I claim as new, and desire to secure by United States Letters Patent is 1. A shade guide for dental rubbers, comprising a vulcanized backing placard with recesses arranged in a complete circle, dental vulcanite rubber blocks of different shades from each other and from said backing plac ard vulcanized within the recesses, a vulcanized circular block rotatively mounted on the said backing placard within a. recess in the backlng placard and within the circle of the sald dental bloc {s corresponding with the shades of said blocks and other dental" mentioned blocks are adjacent each other, and

so that the circular block may be turned for bringing different shades of these blocks adjacent each other. 7

2. A shade guide for dental rubbers, comiprising -a vulcanized backing placard with recesses arranged in a complete circle, dental vulcanite rubber blocks of different shades from each other and from said backing placard vulcanized within the recesses, a vulcanvizcd circular block rotatively mounted on the said backing placard within a recess in the backing placard and within the circle ofthe said dental blocks, other dental blocks corresponding-with the shades of said blocks and vulcanized within recesses in the circular block-along its edges, and a springconnected between the circular block and the backing placard for resiliently holding the circular block in a position so that like shades of the first mentioned blocks and of the second 1nen tionedblocks are adjacent each other, and so that the circular blocks may be turned for bringing different shades of these blocks adjacent each other, said spring being within said recess in the backing placard. and being completely covered by said circular block.

In testimony whereof I have affixed my signature.

GEORGE P. XVANNEMACHER. 

